The atomic number of an atom is always the same as the number of 

• electrons
• protons
• neutrons
• isotopes

An atom's mass number is equal to 

• protons plus electrons
• electrons plus neutrons
• protons plus neutrons

An atom has a mass number of 36 and atomic number of 16. How many neutrons does the atom have?

• 36
• 20
• 16
• 6

Tags

NGSS.MS-PS1-1

An atom with an atomic number of 14 and 26 neutrons has a mass number of?

• 12
• 14
• 26
• 40

Tags

NGSS.MS-PS1-1

The term malleable means 

• being able to form into a wire
• an atom's reactivity
• an atom's atomic structure
• being able to mold or shape

Elements that are in the same row can also be described as being in the same

• group
• period

How are elements in the periodic table arranged?

• by their atomic mass
• by their chemical symbol
• by their chemical name
• by their atomic number

What does the number of electrons in the outer level indicate about the element?

• how reactive the element is
• how malleable the element is
• how brittle the element is

Vertical columns in the periodic table _______ of elements with similar properties

• groups
• periods

The elements along the staircase are called

• metals
• nonmetals
• metalloids
• noble gases

Tags

NGSS.HS-PS1-1